Pronounced "plan to".
A planned sex partner. Often a person from out of town, with whom one has not actually slept but "plans to" upon one's next visit.
Guy 1: I haven't had sex in months.
Guy 2: Should I tell that skank to come talk to you?
Guy 1: Nah, it's cool. I'm visiting my hometown soon, and I have a planto I can take to a hotel room if I get desperate.
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